Why cant Apple blacklist or bar an Macbook Pro

Question

Why does Apple still allow stolen Macbook Pro to be repair under warrenty or apple protection for the criminal?

Answer 1

If I tell you it was stolen at gun point, how would you protect it?
Don't carry it around advertising the fact you have valuables.
It could have been a diamond ring, or a gold chain or anything else perceived as value.
Heck people get robbed of their laundry detergent because it's so easily sold back to crooked store owners or the poor for crack.
Most anyone with big enough nerve to rob you of your machine is certainly not going to turn it on so it can be tracked.
It will sit someplace for quite some time as it cools, it's battery will likely die and it will be bundled up and shipped with other stolen goods to a foreign country, the storage drive wiped and sold locally.
Even if you saw it on the Internet, you wouldn't want to spend the time and money to get it back, or really want it back.
Sorry you got robbed, but it really can happen to anyone and there is little that can be done to prevent it actually unless you hire bodyguards and travel in a bullet proof car and all that jazz.